Vulnerability in json-2-csv (CVE-2026-9673)
Summary
Vulnerability in json-2-csv (CVE-2026-9673). Confidential information can be exposed externally. Mitigation: upgrade to 5.5.11 or later.
Original description
The description as published by the source.
Versions of the package json-2-csv from 3.15.0 and before 5.5.11 are vulnerable to CSV Injection via the preventCsvInjection option which can be bypassed. An attacker can inject formulas into CSV files, which execute when the files are opened in spreadsheet applications.
Source: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-9673 has been found in json-2-csv.
Confidential information can be exposed externally. CVSS score: 6.8/10.
What to do: upgrade json-2-csv to 5.5.11 or later.
If unsure, ask your IT team or search "json-2-csv CVE-2026-9673" on the vendor's site.
CVE-2026-9673 (json-2-csv) — CWE-1236 / CVSS v3 6.8
Attack vector: local / unauthenticated / no user interaction
Patched: 5.5.11 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-1236) exists in json-2-csv.
Check the vendor advisory for the affected versions of json-2-csv.
Severity: Medium (CVSS 6.8/10). Confidential information can be exposed externally.
Update to 5.5.11.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'json-2-csv' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'json-2-csv' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
json-2-csvを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade json-2-csv to 5.5.11ステージング環境で 5.5.11 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
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3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory nvd.nist.gov
- package github.com
- web gist.github.com
- web github.com
- web github.com
- web security.snyk.io
- web github.com
- web report@snyk.io